Egg-case flat



Patented Dec. 25, 1928.

STATES GEORGE A. FILER, 0F CORNELL, WISCONSIN.

EGG-CASE FLAT.

Application filed October 6, 1926.

This invention relates to egg case flats for egg shipping crates.

case flats have heretofore been made f corrugated straw board and the like, provided with transverse grooves or cut-away portions for positioning the cellular filler. In general, however, flats of this type have been of such light weight, flimsy material that a backing or reinforcement was necessary to enable the flat tosust-ain the weight of the eggs resting on it.

It is therefore an object of this invention to provide an egg case flat formed of a single itinreinforced sheetof fiber board, both surfaces of which are corrugated, which will possess greater strength and resiliency than previously known flats.

It is a further object of this invention to provide a simple, inexpensive egg case flat of efficient cushioning effect.

@tier and further important objects of this invention will be apparent from the dis closures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a top plan view of an egg case flat embodying the principles of this invention.

Figure 2 is an enlarged sectional view taken substantially on line 11-11 of Figure 1.

Figure 3 is an end edge view of Figure 1.

Figure 4. is a fragmentary View of a modifled form of my invention.

Figure 5 is a sectional view taken substantially on line V-V of Figure 4.

As shown on the drawings:

Reference numeral 1 indicates an egg case flat which in accordance with the principles of my invention is formed of a single sheet of relatively heavy sheet material, such as fiber board. The fiber board is preferably of about .030 of an inch thickness, since it has been found that board of that thickness when corrugated and used as an egg case fiat does not require any backing or other reinforcement to sustain the eggs without buckling. The egg case flat 1 is provided with corrugations 2 formed by stamping or other suitable means and extending over the entire surface Serial No. 139,771.

of the sheet. As viewed from the top of the sheet, the corrugations 2 comprise ridges 01 nodes 3 and intermediate troughs or depressions a. In accordance with the principles of this invention, transverse grooves 5 are formed at suitably spaced intervals by crushmg the ridges 3 of the corrugations down to the plane of the troughs 4. These transverse grooves 5 it will be understood serve to receive the bottom edges of the cellular fillers commonly used in egg cases, the normal partitions of the filler extending into certain of the troughs 4. In this way thefiller is securely positioned against displacement or collapsing.

It has been found that if a fiber board of substantially the thickness specified is corrugated as by stamping between male and female dies, that the corrugations are rendered extremely resilient. In fact it is practically impossible to permanently deform the corrugations by any sudden blow or by any ordinary weight to which the flats may be subjected. Furthermore the crushing of the corrugations to form the filler positioning grooves adds greatly to the rigidity and sup porting strength of the flat. It is accordingly unnecessary to supply backing or other reinforcing means for the flat and because of this the cost of manufacture is relatively less than in the case of backed corrugated flats.

In Figures 4 and 5 there is shown a modified form of the flat illustrated in Figures 1 to 3 inclusive. In order to more definitely position the egg, a portion of the corrugations 2 bet-ween the grooves 5 is crushed as shown at 6. While the crushed portion 6 has been shown as substantially square or rectangular, it is obvious that it may equally as well be circular in outline. The depressed portion 6 should of course be positioned centrally of the cell formed by the partitions of the filler.

It will be apparent that a simple and inexpensive egg case flat has been devised that because of its natural strength and resiliency imparted by the corrugations, will efficiently support and cushion theeggs against crushmg.

I am aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this m- Yention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

As tn-article of manufacture, an egg case flat comprising a single corrugated sheet of fibrous material having filler positioning grooves extending transversely of said corrugations, portions of st id col-rt tions between sztid grooves bein crushed t0 define egg receiving spaces.

In testimony whereof I here hereunto subscribed In name.

GEORGE k. FHJ R. 

